SOLIDITY n. 3 definitions
The state or quality of being solid; density; consistency, -- opposed to fluidity; compactness; fullness of matter, -- opposed to openness or hollowness; strength; soundness, -- opposed to weakness or instability; the primary quality or affection of matter by which its particles exclude or resist all others; hardness;…
SOLIPED n.
A mammal having a single hoof on each foot, as the horses and asses; a solidungulate. [Written also solipede.] The solipeds, or firm-hoofed animals, as horses, asses, and mules, etc., -- they are, also, in mighty number. Sir T. Browne.